Set top box



FIG. 1 is the perspective view of a set top box showing my new design;

FIG. 2 is the front view thereof;

FIG. 3 is the left side view thereof;

FIG. 4 is the right side view thereof;

FIG. 5 is the top view thereof;

FIG. 6 is the bottom view thereof; and,

FIG. 7 is the rear view thereof.

The ornamental design for a set top box, as shown and described.